Appalachian Trail Conservancy
The Appalachian Trail Conservancy (ATC; formerly Appalachian Trail Conference) is a nonprofit organization dedicated to the conservation of the Appalachian Trail, a route in the eastern United States that runs from Maine to Georgia. Founded in 1925, the ATC is responsible for the day-to-day management of the Appalachian Trail under a cooperative agreement executed with the National Park Service.
Source: Wikipedia — Appalachian Trail Conservancy (CC BY-SA 4.0)